Double-gate balanced valve



Nov. 22, 1927. 1,649,953

C. A. ERNST DOUBLE GATE BALANCED VALVE Filed Oct. 1924 ,7 2 I -91 V/ Q1-.- /7

l6 l5 /9 /2 4 l5 INVENTOB AT TOR/VB Patented Nov. 22-, 1927.

UNITED STA CHARLES A. ERNST, or RAINIER, WASHINGTON. I

DOUBLE-GATE BALANCED Application filed October 15, 1924. Serial No. 743,676. 7 p

The invention is a gate valve in which the gate has a double wall with openings on each side so that the pressure will be equalized.

The object of the invention is to provide a balanced gate valve.

Another objector' the invention is to provioc a sliding valve with a double wall and openings against each wall.

And a further object of the invention is to provide a double wall gate valve in which the valve will operate in a chamber that has inlet openings at each side and an outlet opening through the center.

With these ends in view the invention embodies a valve having a double walled gate slidably mounted in a chamber, another chamber surrounding the sliding chamber and provided with openings to permit asubstance therein to bear against both of the walls of the gate with equal pressure, and an outlet opening through the end of the sliding chamber in which the valve is mounted.

Other features and advantages of the in- F vention will be seen from the following description taken in connection with the drawings, wherein Figure 1 is a longitudinal section through the valve.

Figure 2 is a. sectional plan through the center of the valve chamber. I

Figure 3 is a cross section through thega'te openings in the valve.

Figure'a is an end View.

in the drawings I have shown my valve as it would be constructed wherein numeral 1 indicates the outer chamber, numeral 2 the inner chamber and numeral 3 the gate.

The outer chamber 1 is formed in the outer part of the casing 4 and is provided with an opening 5 into which one end of an inlet pipe 6 may be placed.

The chamber 2 is formed between the upper and lower sections of the chamber 1 by the partitions or walls. 7 and 8, and these walls have openings 9 and 10 through which a substance passes fromthe chamber 1 to.

the chamber 2, and one end of the chamber 2 is provided with an opening 11 into which an outlet pipe 12 may be placed. It will be seen that the upper section of the chamber 1 is connected with the lower section by openings 13 and 14; which pass downward around the small innersection 15 of the chamber 2, and it will also be seen that the valve stem 16,

one end of which is rigidly held in the hub 17 of the valve 3 and the otherend provided with a handle 18, also passes through this chamber. The stem is also held in a bearing 19, at the end of the chamber, and the gate 3 slidably held in the space between the walls 7 and 8 The sides of the valve 3 are provided with flanges 20 and 21 which cover the openings 9 and 10 when the valve is in the closed position. It will be seen that the valve may readily be moved back and forth in the chamber 2 by the handle18 at the outer end and that the pressure of the substance in the.

chamber l will engage the same number of square inches on each side of the valve.

, It will be understood that changes may be made in the construction without departing from the spirit of the invention. One of said changes. may be in the design of the casing, another may be in the design of the gate, another may be in the means for operating the gate and still another maybe in the arrangement of the chambers in the casing.

The construction will be readily understood from the foregoing description.- To use the device it maybe installed in any pipeline Or other suitable device and it will be seen'that as a pressure appears in'the valve, with the gate in the closed position, the

pressure coming from either the inner or the outer opening will act exactly the same against both of the walls of the gate; and as the gate is opened, the openings at each side will always'be equal and the number of square inches,'ofthe movable gate, that are exposed to the pressure at each side of the center will always be the same. 'VVhen the substance is passing from the chamber 1 to the chamber 2 it will also pass through the gate so that the same pressure will be exerted at each end. This will make it possible to slidethe gate with perfect ease at any position as it will always bebalanced, thereby providing a balanced gate valve.

Having thus fully described the invention,

what I claim as new and desire to secure by Letters Patent, is

In a balanced gate .valve of the class de scribed, a rectangular shaped innerchamher with openings in two sides thereof and a boss at one end into which a pipe may be screwed, a. valve member slidable in the said chamber and operable by a. valve stem extending through the end of the said chamber opposite to that in which the pipe is screwed, said valve member havingside plates adaptable to close the openings in the sides of the of the said compartments having a boss into said chambers, a suitable casing in Which the Which a pipe may be screwed, the axis of'the said chamber is formed, and suitable comlast mentioned boss being parallel to the 10 partments at the sides of the said chamber axis of the boss at the end of the said champositioned so that the openings will open her.

into them, said casing having connection pas- I sages between the said compartments and one CHARLES A. ERNST. 

